40404040042 has 16 divisors (see below), whose sum is σ = 62325806400. Its totient is φ = 19636466080.

The previous prime is 40404040013. The next prime is 40404040049. The reversal of 40404040042 is 24004040404.

It is a junction number, because it is equal to n+sod(n) for n = 40404039995 and 40404040022.

It is not an unprimeable number, because it can be changed into a prime (40404040049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1913134 + ... + 1934137.

It is an arithmetic number, because the mean of its divisors is an integer number (3895362900).

Almost surely, 2^40404040042 is an apocalyptic number.

40404040042 is a deficient number, since it is larger than the sum of its proper divisors (21921766358).

40404040042 is a wasteful number, since it uses less digits than its factorization.

40404040042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847421.

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 40404040042 its reverse (24004040404), we get a palindrome (64408080446).

The spelling of 40404040042 in words is "forty billion, four hundred four million, forty thousand, forty-two".